Book 10
1.
Our next business after this is doubtless to discuss Pleasure. For pleasure is thought to be especially congenial to mankind; and
this is why pleasure and pain are employed in the education of the young, as means whereby
to steer their course. Moreover, to like and to dislike the right things is thought to be
a most important element in the formation of a virtuous character. For pleasure and pain
extend throughout the whole of life, and are of great moment and influence for virtue and
happiness; since men choose what is pleasant and avoid what is painful.
[
2]
It would therefore seem by no means proper to omit so important a subject, especially as
there is much difference of opinion about it. Some people maintain that pleasure is the
Good. Others on the contrary say that it is altogether bad: some of them perhaps from a
conviction that it is really so, but others because they think it to be in the interests
of morality to make out that pleasure is bad, even if it is not, since most men
（they argue） have a bias towards it, and are the slaves of their
pleasures, so that they have to be driven in the opposite direction in order to arrive at
the due mean.
[
3]
Possibly however this view is mistaken. In matters of emotion and of action, words are
less convincing than deeds; when therefore our theories are at variance with palpable
facts, they provoke contempt, and involve the truth in their own discredit.
